diff --git a/src/alembic/versions/2023_11_18_2152-78f98d411652_.py b/src/alembic/versions/2023_11_18_2152-78f98d411652_.py
new file mode 100644
index 0000000..3c1a4ca
--- /dev/null
+++ b/src/alembic/versions/2023_11_18_2152-78f98d411652_.py
@@ -0,0 +1,37 @@
+"""empty message
+
+Revision ID: 0ea1059c8f7c
+Revises: 8bd32b7bb552
+Create Date: 2023-11-18 21:52:58.786979
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision: str = "0ea1059c8f7c"
+down_revision: Union[str, None] = "8bd32b7bb552"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column("session", sa.Column("created_at", sa.DateTime(), nullable=False))
+    op.add_column("session", sa.Column("weather_code", sa.Integer(), nullable=False))
+    op.add_column("user", sa.Column("ido_longitude", sa.Float(), nullable=False))
+    op.add_column("user", sa.Column("keido_latitude", sa.Float(), nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column("user", "keido_latitude")
+    op.drop_column("user", "ido_longitude")
+    op.drop_column("session", "weather_code")
+    op.drop_column("session", "created_at")
+    # ### end Alembic commands ###
diff --git a/src/kb_2315/backend/api/endpoints/calendar.py b/src/kb_2315/backend/api/endpoints/calendar.py
index a5c8b89..804369b 100644
--- a/src/kb_2315/backend/api/endpoints/calendar.py
+++ b/src/kb_2315/backend/api/endpoints/calendar.py
@@ -4,8 +4,9 @@
 from fastapi.responses import PlainTextResponse
 from icalendar import Calendar, Event
 
-from kb_2315.backend.crud import crud_sensor, crud_session, crud_shoe
+from kb_2315.backend.crud import crud_session, crud_shoe
 from kb_2315.backend.models import Session
+from kb_2315.backend.weather.code2icon import weather_code2icon
 
 
 router = APIRouter()
@@ -14,27 +15,32 @@
 @router.get("/")
 def get_calendar(shoe_id: int | None = None) -> PlainTextResponse:
     JST = timezone(timedelta(hours=+9), "JST")
+    sessions: list[Session] = crud_session.search_session_by(shoe_id=shoe_id)
 
-    if shoe_id is None:
-        shoe_name: str = "靴"
-        sessions: list[Session] = crud_session.search_session_by()
-    else:
-        shoe_name = crud_shoe.search_shoe_by(shoe_id=shoe_id)[0].name
-        sessions = crud_session.search_session_by(shoe_id=shoe_id)
+    shoe_names: dict[int, str] = {}
+
+    def _search_shoes(shoe_id: int | None) -> str:
+        if shoe_id is None:
+            return "靴"
+        elif shoe_id in shoe_names.keys():
+            return shoe_names[shoe_id]
+        else:
+            shoe_names[shoe_id] = crud_shoe.search_shoe_by(shoe_id=shoe_id)[0].name
+            return shoe_names[shoe_id]
 
     cal: Calendar = Calendar()
-    cal["summary"] = f"{shoe_name} の乾燥記録"
+    cal["summary"] = f"{_search_shoes(shoe_id=shoe_id)} の乾燥記録"
     cal["scale"] = "GREGORIAN"
     cal["method"] = "PUBLISH"
-    cal["X-WR-CALNAME"] = f"{shoe_name} の乾燥記録"
+    cal["X-WR-CALNAME"] = f"{_search_shoes(shoe_id=shoe_id)} の乾燥記録"
     cal["X-WR-TIMEZONE"] = "Asia/Tokyo"
 
     for s in sessions:
         try:
-            last_time: datetime = crud_sensor.search_sensor_by(session_id=s.session_id)[0].time
+            last_time: datetime = s.created_at
 
             e: Event = Event(
-                SUMMARY=f"{crud_shoe.search_shoe_by(shoe_id= s.shoe_id)[0].name} を履いた",
+                SUMMARY=f"天気: { weather_code2icon(s.weather_code)}, {_search_shoes(shoe_id=s.shoe_id)} を履いた",
                 DTSTART=datetime(
                     last_time.year, last_time.month, last_time.day, time(7, 0).hour, time(7, 0).minute, tzinfo=JST
                 )
diff --git a/src/kb_2315/backend/api/endpoints/session.py b/src/kb_2315/backend/api/endpoints/session.py
index 8eb213c..98d87b5 100644
--- a/src/kb_2315/backend/api/endpoints/session.py
+++ b/src/kb_2315/backend/api/endpoints/session.py
@@ -3,7 +3,8 @@
 from fastapi import APIRouter
 
 from kb_2315 import notify
-from kb_2315.backend.crud import crud_session
+from kb_2315.backend.crud import crud_session, crud_user
+from kb_2315.backend.models import User
 from kb_2315.backend.schemas import schema_session
 from kb_2315.config import conf
 
@@ -13,9 +14,17 @@
 
 @router.get("/")
 def create_session(device_id: int) -> schema_session.create_session:
-    session_id: UUID = crud_session.add_session(device_id=device_id)
-
-    notify.line.send_message(message=f"乾燥を開始しました\n{conf.host_url}/analyze/?session_id={session_id}\n\n靴を選んでください")
-    notify.line.shoe_select_carousel(session_id=session_id)
+    user: User = crud_user.search_user_by()[0]
+
+    session_id: UUID = crud_session.add_session(user=user, device_id=device_id)
+
+    notify.line.send_message(
+        message=f"乾燥を開始しました\n{conf.host_url}/analyze/?session_id={session_id}\n\n靴を選んでください",
+        send_to_id=user.line_channel_id,
+    )
+    notify.line.shoe_select_carousel(
+        session_id=session_id,
+        send_to_id=user.line_channel_id,
+    )
 
     return schema_session.create_session(session_id=session_id)
diff --git a/src/kb_2315/backend/crud/crud_session.py b/src/kb_2315/backend/crud/crud_session.py
index d18c393..0b251bd 100644
--- a/src/kb_2315/backend/crud/crud_session.py
+++ b/src/kb_2315/backend/crud/crud_session.py
@@ -2,17 +2,19 @@
 
 from sqlalchemy.orm import Query
 
-from kb_2315.backend.models import Session
+from kb_2315.backend.models import Session, User
+from kb_2315.backend.weather import api as weather_api
 
 from .base_crud import base_CRUD
 
 
 class CRUD_Session(base_CRUD):
-    def add_session(self, device_id: int, shoe_id: int | None = None) -> UUID:
+    def add_session(self, user: User, device_id: int, shoe_id: int | None = None) -> UUID:
         with self._Session() as session:
             new_session = Session()
             new_session.shoe_id = shoe_id
             new_session.device_id = device_id
+            new_session.weather_code = weather_api.get_weather_code(user.ido_longitude, user.keido_latitude)
 
             session.add(new_session)
             session.commit()
diff --git a/src/kb_2315/backend/models/model_session.py b/src/kb_2315/backend/models/model_session.py
index dc08b8f..a32e86e 100644
--- a/src/kb_2315/backend/models/model_session.py
+++ b/src/kb_2315/backend/models/model_session.py
@@ -1,8 +1,9 @@
 import uuid
+from datetime import datetime
 from typing import TYPE_CHECKING
 from uuid import UUID
 
-from sqlalchemy import ForeignKey, Integer, Uuid
+from sqlalchemy import DateTime, ForeignKey, Integer, Uuid
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from kb_2315.backend.db.base import Base
@@ -21,4 +22,7 @@ class Session(Base):
     device_id: Mapped[int] = mapped_column(Integer, nullable=False)
     shoe_id: Mapped[int | None] = mapped_column(Integer, ForeignKey("shoe.id"), nullable=True)
 
+    weather_code: Mapped[int] = mapped_column(Integer, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)
+
     sensors: Mapped[list[Sensor]] = relationship("Sensor", backref="event")
diff --git a/src/kb_2315/backend/models/model_user.py b/src/kb_2315/backend/models/model_user.py
index ac4d2f9..a15bdbd 100644
--- a/src/kb_2315/backend/models/model_user.py
+++ b/src/kb_2315/backend/models/model_user.py
@@ -1,4 +1,4 @@
-from sqlalchemy import Integer, String
+from sqlalchemy import Float, Integer, String
 from sqlalchemy.orm import Mapped, mapped_column
 
 from kb_2315.backend.db.base import Base
@@ -8,3 +8,6 @@ class User(Base):
     id: Mapped[int] = mapped_column(Integer, primary_key=True)
     name: Mapped[str] = mapped_column(String, default="Taro")
     line_channel_id: Mapped[str] = mapped_column(String, nullable=True)
+
+    ido_longitude: Mapped[float] = mapped_column(Float, nullable=False)
+    keido_latitude: Mapped[float] = mapped_column(Float, nullable=False)
diff --git a/src/kb_2315/backend/weather/api.py b/src/kb_2315/backend/weather/api.py
new file mode 100644
index 0000000..5f64e5b
--- /dev/null
+++ b/src/kb_2315/backend/weather/api.py
@@ -0,0 +1,15 @@
+import requests
+
+
+def get_weather_code(ido_longitude: float, keido_latitude: float) -> int:
+    url: str = (
+        f"https://api.open-meteo.com/v1/forecast?latitude={ido_longitude}&longitude={keido_latitude}"
+        "&timezone=Asia%2FTokyo&forecast_days&current=weather_code"
+    )
+
+    try:
+        r = requests.get(url).json()
+        return r.get("daily").get("weather_code")
+    except Exception:
+        # 困ったら曇り
+        return 2
diff --git a/src/kb_2315/backend/weather/code2icon.py b/src/kb_2315/backend/weather/code2icon.py
new file mode 100644
index 0000000..42b43ac
--- /dev/null
+++ b/src/kb_2315/backend/weather/code2icon.py
@@ -0,0 +1,45 @@
+def weather_code2icon(weather_code: int) -> str:
+    """
+    WMO 天気コードを4分類にする
+    https://open-meteo.com/en/docs
+    https://www.jodc.go.jp/data_format/weather-code_j.html#:~:text=%E7%8F%BE%E5%9C%A8%E5%A4%A9%E5%80%99(Present%20Weather)%20(WMO%20Code%204677)
+    """
+    if weather_code in ["0", "1"]:
+        # 晴れ
+        return "☀"
+
+    elif weather_code in ["2", "3"]:
+        # 曇り
+        return "☁"
+
+    elif weather_code in [
+        # 雨
+        "45",
+        "48",
+        "51",
+        "53",
+        "55",
+        "56",
+        "57",
+        "61",
+        "63",
+        "65",
+        "66",
+        "67",
+        "80",
+        "81",
+        "82",
+        "95",
+        "96",
+        "99",
+    ]:
+        return "🌧"
+
+    elif weather_code in ["71", "73", "75", "77", "85", "86"]:
+        # 雪
+        return "🌨"
+
+    # その他
+    else:
+        # その他，曇りとする
+        return "☁"